A sock is an item of clothing worn on the feet. Some type of shoe or boot is typically worn over socks. In ancient times, socks were made from leather or matted animal hair. In the late 16th century, machine-knit socks were first produced. Until 1800 both hand knitting and machine knitting were used to produce socks, but after 1800, machine knitting became the predominant method.

The foot is among the heaviest producers of sweat in the body, as it is able to produce over a pint of perspiration per day. Socks help to absorb this sweat and draw it to areas where air can evaporate the perspiration. In cold environments, socks decrease the risk of frostbite. Socks have changed over the centuries from the earliest models which were made from animal skins gathered up and tied around the ankles.

The global market is segmented on the basis of product analysis, material used, by gender, and by region. On the basis of product analysis, the global market is classified into Specialty Socks, Athletic Socks, Trouser Socks, Women's Socks, Casual Socks, Others. Demand for various socks types is driven by increasing demand for different footwear. For instance, high demand for athletic shoes is expected to boost demand for athletic socks. Specialty socks were the largest product segment, driven by their varied use and is expected to grow during forecast period by 2025 with maximum market share.

On the basis of material used, the global market is classified into nylon, cotton, polyester, wool, waterproof breathable membrane. Nylon and polyester socks account for majority share of the global socks market. This is attributed to the fact that synthetic fibers, particularly nylon, are strong and make an excellent choice for socks which commonly receive hard wear. Besides durability, synthetic fibers add shrink resistance. Socks may be 100 per cent nylon or reinforced at the toe and heel with this durable fiber.

Demand for natural fibers such as cotton and wool is expected to decline, especially in the developing economies. Demand for synthetic socks has outpaced their natural fiber counterparts. However, demand for natural fiber knitted socks is considerably high in developed economies such as the U.S., Germany, England, and France.

On the basis of gender, the global market is classified into men, women, and kids. The men’s segment accounted for the largest market share in 2014. Around 71% men wear socks every day. This is due to extensive usage of socks by men and improving fashion statements, the men’s segment is projected to witness steady growth at a substantial rate; whereas, women and kids segment is expected to grow gradually during the forecast period from 2014 to 2025.